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annotate packages/io/common/current/include/devtab.h @ 210:d2c90368aeef

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Merge from eCos master repository on 2002-05-23-21:39:14-BST
author jlarmour
date Thu, 23 May 2002 22:59:51 +0000
parents e0c0827131d1
children 44d250ab3b3a
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1 #ifndef CYGONCE_IO_DEVTAB_H
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2 #define CYGONCE_IO_DEVTAB_H
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3 // ====================================================================
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4 //
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5 // devtab.h
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6 //
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7 // Device I/O Table
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8 //
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9 // ====================================================================
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10 //####ECOSGPLCOPYRIGHTBEGIN####
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11 // -------------------------------------------
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12 // This file is part of eCos, the Embedded Configurable Operating System.
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13 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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14 //
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15 // eCos is free software; you can redistribute it and/or modify it under
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16 // the terms of the GNU General Public License as published by the Free
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17 // Software Foundation; either version 2 or (at your option) any later version.
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18 //
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19 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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20 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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21 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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22 // for more details.
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23 //
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24 // You should have received a copy of the GNU General Public License along
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25 // with eCos; if not, write to the Free Software Foundation, Inc.,
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26 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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27 //
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28 // As a special exception, if other files instantiate templates or use macros
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29 // or inline functions from this file, or you compile this file and link it
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30 // with other works to produce a work based on this file, this file does not
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31 // by itself cause the resulting work to be covered by the GNU General Public
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32 // License. However the source code for this file must still be made available
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33 // in accordance with section (3) of the GNU General Public License.
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34 //
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35 // This exception does not invalidate any other reasons why a work based on
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36 // this file might be covered by the GNU General Public License.
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37 //
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38 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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39 // at http://sources.redhat.com/ecos/ecos-license/
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40 // -------------------------------------------
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41 //####ECOSGPLCOPYRIGHTEND####
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42 // ====================================================================
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43 //#####DESCRIPTIONBEGIN####
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44 //
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45 // Author(s): gthomas
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46 // Contributors: gthomas
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47 // Date: 1999-02-04
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48 // Purpose: Describe low level I/O interfaces.
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49 // Description:
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50 //
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51 //####DESCRIPTIONEND####
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52 //
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53 // ====================================================================
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54
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55 // Private include file. This file should only be used by device
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56 // drivers, not application code.
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57
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58 #include <pkgconf/system.h>
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59 #include <cyg/io/io.h>
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60 #include <cyg/hal/drv_api.h>
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61 #include <cyg/hal/hal_tables.h>
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62
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63 // Set of functions which handle top level I/O functions
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64 typedef struct {
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65 Cyg_ErrNo (*write)(cyg_io_handle_t handle,
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66 const void *buf,
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67 cyg_uint32 *len);
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68 Cyg_ErrNo (*read)(cyg_io_handle_t handle,
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69 void *buf,
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70 cyg_uint32 *len);
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71 Cyg_ErrNo (*bwrite)(cyg_io_handle_t handle,
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72 const void *buf,
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73 cyg_uint32 *len,
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74 cyg_uint32 pos);
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75 Cyg_ErrNo (*bread)(cyg_io_handle_t handle,
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76 void *buf,
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77 cyg_uint32 *len,
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78 cyg_uint32 pos);
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79 cyg_bool (*select)(cyg_io_handle_t handle,
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80 cyg_uint32 which,
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81 CYG_ADDRWORD info);
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82 Cyg_ErrNo (*get_config)(cyg_io_handle_t handle,
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83 cyg_uint32 key,
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84 void *buf,
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85 cyg_uint32 *len);
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86 Cyg_ErrNo (*set_config)(cyg_io_handle_t handle,
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87 cyg_uint32 key,
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88 const void *buf,
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89 cyg_uint32 *len);
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90 } cyg_devio_table_t;
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91
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92
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93 // Default functions
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94
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95 __externC Cyg_ErrNo cyg_devio_cwrite(cyg_io_handle_t handle,
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96 const void *buf, cyg_uint32 *len);
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97 __externC Cyg_ErrNo cyg_devio_cread(cyg_io_handle_t handle,
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98 void *buf, cyg_uint32 *len);
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99 __externC Cyg_ErrNo cyg_devio_bwrite(cyg_io_handle_t handle,
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100 const void *buf, cyg_uint32 *len,
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101 cyg_uint32 pos);
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102 __externC Cyg_ErrNo cyg_devio_bread(cyg_io_handle_t handle,
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103 void *buf, cyg_uint32 *len,
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104 cyg_uint32 pos);
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105
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106 __externC Cyg_ErrNo cyg_devio_select(cyg_io_handle_t handle,
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107 cyg_uint32 which,
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108 CYG_ADDRWORD info);
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109
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110 __externC Cyg_ErrNo cyg_devio_get_config(cyg_io_handle_t handle,
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111 cyg_uint32 key,
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112 void* buf,
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113 cyg_uint32* len);
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114
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115 __externC Cyg_ErrNo cyg_devio_set_config(cyg_io_handle_t handle,
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116 cyg_uint32 key,
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117 void* buf,
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118 cyg_uint32* len);
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119
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120 // Initialization macros
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121
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122 #define CHAR_DEVIO_TABLE(_l,_write,_read,_select,_get_config,_set_config) \
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123 cyg_devio_table_t _l = { \
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124 _write, \
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125 _read, \
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126 cyg_devio_bwrite, \
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127 cyg_devio_bread, \
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128 _select, \
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129 _get_config, \
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130 _set_config, \
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131 };
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132
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133 #define BLOCK_DEVIO_TABLE(_l,_bwrite,_bread,_select,_get_config,_set_config) \
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134 cyg_devio_table_t _l = { \
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135 cyg_devio_cwrite, \
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136 cyg_devio_cread, \
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137 _bwrite, \
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138 _bread, \
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139 _select, \
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140 _get_config, \
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141 _set_config, \
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142 };
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143
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144 #define DEVIO_TABLE(_l,_write,_read,_select,_get_config,_set_config) \
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145 CHAR_DEVIO_TABLE(_l,_write,_read,_select,_get_config,_set_config)
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146
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147 typedef struct cyg_devtab_entry {
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148 const char *name;
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149 const char *dep_name;
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150 cyg_devio_table_t *handlers;
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151 bool (*init)(struct cyg_devtab_entry *tab);
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152 Cyg_ErrNo (*lookup)(struct cyg_devtab_entry **tab,
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153 struct cyg_devtab_entry *sub_tab,
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154 const char *name);
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155 void *priv;
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156 unsigned long status;
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157 } CYG_HAL_TABLE_TYPE cyg_devtab_entry_t;
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158
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159 #define CYG_DEVTAB_STATUS_AVAIL 0x0001
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160 #define CYG_DEVTAB_STATUS_CHAR 0x1000
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161 #define CYG_DEVTAB_STATUS_BLOCK 0x2000
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162
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163 extern cyg_devtab_entry_t __DEVTAB__[], __DEVTAB_END__;
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164
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165 #define CHAR_DEVTAB_ENTRY(_l,_name,_dep_name,_handlers,_init,_lookup,_priv) \
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166 cyg_devtab_entry_t _l CYG_HAL_TABLE_ENTRY(devtab) = { \
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167 _name, \
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168 _dep_name, \
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169 _handlers, \
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170 _init, \
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171 _lookup, \
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172 _priv, \
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173 CYG_DEVTAB_STATUS_CHAR \
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174 };
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175
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176 #define BLOCK_DEVTAB_ENTRY(_l,_name,_dep_name,_handlers,_init,_lookup,_priv) \
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177 cyg_devtab_entry_t _l CYG_HAL_TABLE_ENTRY(devtab) = { \
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178 _name, \
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179 _dep_name, \
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180 _handlers, \
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181 _init, \
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182 _lookup, \
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183 _priv, \
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184 CYG_DEVTAB_STATUS_BLOCK \
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185 };
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186
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187 #define DEVTAB_ENTRY(_l,_name,_dep_name,_handlers,_init,_lookup,_priv) \
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188 CHAR_DEVTAB_ENTRY(_l,_name,_dep_name,_handlers,_init,_lookup,_priv)
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189
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190
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191 #define DEVTAB_ENTRY_NO_INIT(_l,_name,_dep_name,_handlers,_init,_lookup,_priv) \
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192 cyg_devtab_entry_t _l = { \
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193 _name, \
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194 _dep_name, \
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195 _handlers, \
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196 _init, \
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197 _lookup, \
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198 _priv, \
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199 CYG_DEVTAB_STATUS_CHAR \
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200 };
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201
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202 #endif // CYGONCE_IO_DEVTAB_H